High-Precision Ringdown Surrogate Model for Non-Precessing Binary Black Holes

Understand

Highly precise and robust waveform models are required as improvements in detector sensitivity enable us to test general relativity with more precision than ever before.

• In this work, we introduce a spin-aligned surrogate ringdown model.
• This ringdown surrogate, NRSur3dq8_RD, is built with numerical waveforms produced using Cauchy-characteristic evolution.
• In addition, these waveforms are in the superrest frame of the remnant black hole allowing us to do a correct analysis of the ringdown spectrum.